package jdbc;

import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.Statement;

public class JDBCDemo4 {
    public static void main(String[] args) throws Exception {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true","root","root");
        System.out.println("数据库链接成功！！");
        Statement statement = connection.createStatement();

        String sql = "update userinfo\n" +
                "set nickname = '小张'\n" +
                "where id = 1";

        int count = statement.executeUpdate(sql);
        System.out.println(count > 0 ? "更新成功！" : "更新失败！");
        connection.close();


    }
}
